This man angered Isabella de l'Anguileme when he named his brother as the Comte de Poitou. He won a battle against Henry III and the Comte de la Marche before negotiating a truce with Hugh of Lusignan at Taillebourg Bridge. John of Ibelin helped this man to push Fakhr ad-Din to Damietta in his most famous initiative, which later saw the arrival of Alfonso of Poitou at Cairo. He was captured at the Battle of Farsikur during a war that he fought alongside his brother, Robert of Artois. This son of Blanche of Castille and was the leader of the Seventh Crusade. For 10 points, name this ruler from 
This man angered Isabella de l'Anguileme when he named his brother as the Comte de Poitou. He won a battle against Henry III and the Comte de la Marche before negotiating a truce with Hugh of Lusignan at Taillebourg Bridge. John of Ibelin helped this man to push Fakhr ad-Din to Damietta in his most famous initiative, which later saw the arrival of Alfonso of Poitou at Cairo. He was captured at the Battle of Farsikur during a war that he fought alongside his brother, Robert of Artois. This son of Blanche of Castille and was the leader of the Seventh Crusade. For 10 points, name this ruler from 1226 to 1270, the only French king to be canonized.
This man angered Isabella de l'Anguileme when he named his brother as the Comte de Poitou.
{Louis IX} [or {Saint Louis}; prompt on {Louis}]